/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-accent: #f59e0b;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --color-footer: #0f172a;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 40px rgba(37, 99, 235, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo:hover {
  color: var(--color-text);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  border-radius: 8px;
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background: rgba(37, 99, 235, 0.08);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: #fff;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(245, 158, 11, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
  color: #fff;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  font-size: 0.875rem;
  letter-spacing: 2px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero-desc {
  max-width: 560px;
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ===== Features ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 32px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.feature-icon {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.3;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===== Services Grid ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.service-item {
  padding: 28px;
  background: #fff;
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.service-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.service-item p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  text-align: center;
}

.cta-content h2 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta-content p {
  opacity: 0.9;
  margin-bottom: 32px;
}

/* ===== Page Hero ===== */
.page-hero {
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-hero p {
  opacity: 0.9;
  font-size: 1.1rem;
}

/* ===== Content Block ===== */
.content-block {
  max-width: 800px;
}

.content-block h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--color-text);
}

.content-block p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.content-block ul {
  padding-left: 24px;
  color: var(--color-text-muted);
}

.content-block li {
  margin-bottom: 8px;
}

/* ===== Values ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.value-card {
  padding: 32px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.value-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.value-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.commitment-list {
  list-style: none;
  padding: 0;
}

.commitment-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 14px;
  color: var(--color-text-muted);
}

.commitment-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* ===== Service Detail ===== */
.service-detail-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.service-detail {
  display: flex;
  gap: 32px;
  padding: 32px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.service-detail-num {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 14px;
}

.service-detail-body h2 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.service-detail-body p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.service-detail-body ul {
  padding-left: 20px;
  color: var(--color-text-muted);
}

.service-detail-body li {
  margin-bottom: 6px;
}

/* ===== Process ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.process-step {
  text-align: center;
  padding: 28px 20px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.process-step p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ===== Contact ===== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info h2,
.contact-form-wrap h2 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.contact-item {
  margin-bottom: 28px;
}

.contact-item h3 {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.contact-item p {
  font-size: 1.05rem;
}

.contact-form {
  background: var(--color-bg-alt);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===== Legal ===== */
.legal-content h2 {
  font-size: 1.25rem;
  margin-top: 32px;
  margin-bottom: 12px;
}

.legal-content h2:first-child {
  margin-top: 0;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-footer);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 32px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-info p {
  font-size: 0.85rem;
}

.footer-info .icp a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-info .icp a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* ===== Intro Block ===== */
.intro-block {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.intro-text h2 {
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.intro-text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.intro-text .btn {
  margin-top: 12px;
}

.intro-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.highlight-item {
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  text-align: center;
}

.highlight-item strong {
  display: block;
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.highlight-item span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ===== Audience Grid ===== */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.audience-card {
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
}

.audience-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.audience-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.footer-sub {
  font-size: 0.8rem;
  opacity: 0.6;
  margin-top: 4px;
}

.contact-official {
  max-width: 720px;
  margin: 0 auto;
}

.site-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.site-nav-card {
  display: block;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: all var(--transition);
}

.site-nav-card:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.site-nav-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.site-nav-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.footer-contact {
  font-size: 0.85rem;
  opacity: 0.75;
  margin-top: 6px;
}

.footer-contact a {
  color: rgba(255, 255, 255, 0.75);
}

.footer-contact a:hover {
  color: #fff;
}

/* ===== Timeline ===== */
.timeline-list {
  list-style: none;
  padding: 0;
}

.timeline-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 20px;
  color: var(--color-text-muted);
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

.timeline-list strong {
  display: block;
  color: var(--color-text);
  margin-bottom: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .hero {
    min-height: 480px;
  }

  .hero-content {
    padding: 60px 24px;
  }

  .section {
    padding: 56px 0;
  }

  .service-detail {
    flex-direction: column;
    gap: 20px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .intro-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}